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The generator of AM EMFs consists of a battery-driven radiofrequency (RF) EMF generator connected to a 1.5 m long 50 ? coaxial cable, to the other end of which a stainless-steel spoon-shaped mouthpiece is connected via an impedance transformer. The RF source of the device corresponds to a class C amplifier operating at 27.12 MHz. The carrier frequency is AM with a modulation depth of 85±5%, whereas the modulation frequency is generated by a digital direct synthesiser with a resolution of 10-7. The treatment sequence is controlled by a microcontroller (Atmel AT89S8252, Fribourg, Switzerland), that is, duration of session, sequence of modulation frequencies and duration of each sequence can be programmed via PC over a RS232 interface. The RF output is adjusted to 100 mW into a 50 ? load, which results in an emitting power identical to that of the device used for the treatment of insomnia.
it''s 3 assignments and each assignment have 7 questions so each assignment have 1 hour when I open it I have only 1 hour to finish it I can show him or her the practice question t
develop and explain series and parallel magnetic circuits?
Q. The DeMorgan's theorems suggest that the basic logic operations can be realized by use of inverters and NAND gates only. For the circuits shown in Figure, find the truth table,
A 6-pole armature has 1000 conductors and a flux per pole of 40mWb. Determine the e.m.f. generated when running at 600 rev/min when (a) lap wound (b) wave wound.
Q. Explain topology method used in LAN technology? Ans: LAN Topologies: Network topology is a physical schematic which demonstrates interconnection of the many users. Th
Q. What do you mean by Frequency response? Now let us examine the response of a circuit to a sinusoidal source, called an oscillator, whose frequency can be varied.Known as the
what is the purpose of superposition theorem
Call Instructions Call instruction are used to call a subroutine program in assembly language procedure and functions are called subroutines. There are two types of calls i
what are the classifications of fixed resistor?explain
can I get matlab code for out of band radiation reduction ofdm system
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